tmp89fm42 TOSHIBA Semiconductor CORPORATION, tmp89fm42 Datasheet - Page 326

• Manufacturer Part Number: tmp89fm42
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

21. Flash Memory
RA003
21.3 Command Sequence
Table 21-1 Command Sequence
1
2
3
4
5
6
21.3.1 Byte program
(partial erase in units of
Command sequence
shown in Table 21-1.
Security Program
Product ID Entry
Product ID Exit
In MCU and serial PROM modes, the command sequence consists of six commands (JEDEC compatible), as
Note 1: Specify the address and data to be written (Refer to Table 21-2 about BA).
Note 2: The area to be erased is specified with the upper 4 bits of the address (Refer to Table 21-3 about SA).
Note 3: Do not start the STOP, IDLE0, IDLE1, IDLE2, SLEEP1 or SLEEP0 mode while a command sequence is being executed or
Note 4: # ; 0x8 through 0xF should be specified as the upper 4bits of the address. Usually, it is recommended that 0xF is speci-
Note 5: XXX ; Don’t care
Byte Program
Sector Erase
Chip Erase
(all erase)
4KB)
in the 4th bus write cycle. The range of addresses that can be specified is shown in Table 21-2. For example, to
write data to 0x8000 in the data area, set FLSCR1<FAREA> to "0y00", set "0xD5" on FLSCR2<CR1EN>, and
then specify 0x8000 as an address in the 4th bus write cycle. The time needed to write each byte is 40 Ps max-
imum. The next command sequence cannot be executed if an ongoing write operation is not completed. To
check the completion of the write operation, perform read operations twice on the same address in the flash
memory, and perform polling until the same data is read from the flash memory. During the write operation, bit
6 is reversed each time a read is performed.
This command writes the flash memory in units of one byte. The address and data to be written are specified
Note 1: To rewrite data to addresses in the flash memory where data (including 0xFF) is already written, make sure
Note 2: The data and code areas become mirror areas. As you access these areas, you are brought to the same
Note 3: Do not perform a Byte Program on areas other than those shown in Table 21-2.
a task specified in a command sequence is being executed (write, erase or ID entry).
fied.
Table 21-2 Range of Addresses Specifiable (BA)
that you erase the existing data by performing a sector erase or chip erase before writing data.
physical address in memory. When performing a Byte Program, make sure that you write data to either of
these two areas, not both.
(Code area)
(Data area)
AREA D1
AREA C1
0x#555
0x#555
0x#555
0x#555
0x#555
0xXX
Add
1st Bus Write
Cycle
0xAA
0xAA
0xAA
0xAA
0xAA
Data
0xF0
Write Area
0x8000 through 0xFFFF
0x8000 through 0xFFFF
0x#AAA
0x#AAA
0x#AAA
0x#AAA
0x#AAA
2nd Bus Write
Add
-
Cycle
Data
0x55
0x55
0x55
0x55
0x55
-
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0x#555
0x#555
0x#555
0x#555
0x#555
Add
3rd Bus Write
-
Cycle
<FAREA>
FLSCR1
00
10
0xA0
0x80
0x80
0x90
0xA5
Data
-
(Note 1)
0xFF7F
0x#555
0x#555
Address specified by instruction
(Address of 4th bus write cycle)
Add
4th Bus Write
BA
-
-
0x8000 through 0xFFFF
0x8000 through 0xFFFF
Cycle
(Note 1)
0xAA
0xAA
0x00
Data
Data
-
-
0x#AAA
0x#AAA
Add
5th Bus Write
-
-
-
-
Cycle
0x55
0x55
Data
-
-
-
-
(Note 2)
0x#555
TMP89FM42
Add
6th Bus Write
SA
-
-
-
-
Cycle
Data
0x30
0x10
-
-
-
-